The physical chemistry of igneous rock formation

Igneous rocks of Junggar Basin are hard, strong abrasive and poor drillability. ROP is low in drilling these rocks, and drilling cycle is long, which seriously affect the process of exploration and development in the Carboniferous reservoir. Considering the igneous rock formation characteristics and the drilling problems, using PDC impregnated diamond high strength, super abrasion as the main rock breaking device, a new type of cutting and grinding of diamond impregnated bit was developed. This bit has the following characteristics: Compound cutting structure with blades and cylindrical Impregnated cutters; big nozzle in the center + deep radiation water slot hydraulic structures; Natural diamond and TSP lengthened gauge design; Selection of 40/50 mesh diamond grit, mix two kinds of inserts with diamond concentration 70%.The bit has the combination of impregnated bit and PDC drill bit technical advantages, which improve the bit adaptability to the formations. Hassan3 Carboniferous igneous formations field test shows that: average ROP is 0.71m / h, single bit footage is 86.5m, which increased by about 20% and 302% respectively compared with high efficient three-roller bits. The success usage of this bit in Hassan 3 provide an effective means for high quality fast drilling in Junggar Basin igneous rock formation.

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The physicial chemistry of igneous rock formation. A General Discussion held by the faraday Society, the Geological Soceity, and the Mineral-orgical Society, October, 1924. Pp. 414-501. London: Faraday Society, 1925. Price 6s. 6d

Journal of the Society of Chemical Industry ◽

10.1002/jctb.5000443405 ◽

1925 ◽

Vol 44 (34) ◽

pp. 851-852

Author(s):

G. W. Tyrrell

Keyword(s):

Igneous Rock ◽

Rock Formation

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Design and Study of PDC Bit for Igneous Rock Formation of Santanghu

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.379 ◽

2010 ◽

Vol 156-157 ◽

pp. 379-382

Author(s):

Zhong Liang Wei ◽

Jian Qun Zhang ◽

Ji Tai Li ◽

Ji Biao Xue ◽

Yong Zhang

Keyword(s):

Igneous Rock ◽

Polycrystalline Diamond ◽

High Hardness ◽

Rake Angle ◽

Design Methods ◽

Optimized Design ◽

Rock Stratum ◽

Rock Formation ◽

Crown Shape ◽

Pdc Bit

Based on the geological configuration and formation lithology of igneous rock stratum of Santanghu, optimized design methods of PDC (polycrystalline diamond compact) bit are used to design PDC bit crown shape, cutting angle, the distribution of cutters and hydraulic structure, etc. Especially, these methods, which are design methods of gentle crown profile, spiral blade, high-density distribution of cutters, suitable back rake angle, and hydraulic structures which are more flexible nozzles of asymmetric arrangement and deeper fluid course layout, are fit for high hardness, multiple interbed and high abrasiveness of the igneous rock formation. The bit designed in this paper has turned out to be much better in the experiment of Horse 36 well of Santanghu.

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